Specifically engineered for extended drain intervals up to 500,000 miles as set by equipment manufacturers for over-the-road trucks and heavy equipment. Provides long life in passenger cars and trucks. Protects against wear and improves equipment life. Excellent "All Season" summer and winter performance. Outperforms all conventional gear oils. Compatible with most limited-slip differentials.

Use AMSOIL Extended Drain Synthetic Gear oils in differentials, manual transmissions or other gear applications where one or more of the following standards are specified: API GL-5 & MT-1, MIL-PRF-2105E, Dana SHAES 234 (Formerly Eaton PS-037) for 250,000 miles, Dana SHAES 256 (Formerly Eaton PS-163) for 500,000 miles, Mack GO-J & GO-J+, Meritor 0-76N (75W-90) & 0-80 (80W-140), and Navistar TMS 6816 plus hypoid gear oil specifications from all foreign and domestic manufacturers such as GM, Ford and Daimler Chrysler. Can also be used in rear axles where API Service GL-4 lubricant is recommended.

Product Description
AMSOIL Long Life Synthetic Gear Lubes are extended drain gear lubes engineered specifically to last several times longer and protect gears better than all conventional gear oils. These exclusive AMSOIL formulations of premium synthetic base oils and high performance additives resist acid, carbon and varnish formation from oxidative breakdown. Components run cleaner and last longer. AMSOIL Long Life Synthetic Gear Lubes are shear stable and friction reducing. They maintain their viscosity during extended service for maximum wear control and they are fuel-efficient. The superior cold temperature fluidity and high temperature stability properties of AMSOIL Long Life Synthetic Gear Lubes make them excellent for all-season use. Equipment lasts longer and maintenance costs are reduced with AMSOIL Long Life Synthetic Gear Lubes.

Keep out of the reach of children. Don't pollute. Return used oil to collection centers.

TYPICAL
TECHNICAL PROPERTIES

AMSOIL
Long Life Synthetic Gear Lube 75W-90 (FGR)

Kinematic Viscosity
@ 100°C, cSt (ASTM D-445)

15.9

Kinematic Viscosity
@ 40°C, cst (ASTM D-445)

122.6

Viscosity Index
(ASTM D-2270)

138

Brookfield
Viscosity, cP (150,000 Max)

92,325
@ -40°C

Flash Point,
°C (°F) (ASTM D-92) 150°C Min.

212 (414)

Pour Point,
°C (°F) (ASTM D-97)

-51(-67)

Copper Corrosion
(ASTM D-130) 1b Max @ 121 °C (250°F)
/ 3hr

1b

Falex Procedure
B (ASTM D-3233) (failure load, lbf.)

1500

Foam Stability
(ASTM D-892) (20/50/20 maximum)

0/0/0

For product service life in
differentials, consult your owner's manual or
the Original Equipment Manufacturer (OEM) to
establish the application, NORMAL or SEVERE.

NORMAL

SEVERE

Cars,
SUV, Light Trucks

Drain
at 100,000 miles of service or according
to the owner's manual, whichever is longer

Drain
at 50,000 miles of service or according
to the owner's manual, whichever is longer

Heavy
Duty
Class 8 Line Haul

Follow the OEM drain interval (miles or hours) for synthetic oil up to 500,000 miles or three years, whichever comes first. Otherwise, drain at twice the OEM interval for petroleum oil.

Heavy
Duty
Off-Road Vocational

Follow the OEM drain interval (miles or hours) for synthetic oil up to 120,000 miles or one year, whichever comes first. Otherwise, drain at twice the OEM interval for petroleum oil.

For product service life in
non-differential applications, consult owner's
manual or the OEM for either normal or severe
synthetic oil service intervals. Where service
intervals are unavailable, drain at twice the
interval for conventional oil.
Note: AMSOIL does
not support extended drain intervals where water
contamination occurs. Check and service the
gear oil frequently when water contamination
is possible.
Gear oils should be changed more
frequently when operating vehicles or equipment
in dusty or dirty conditions unless the gear
system is properly sealed and equipped with
membrane type breathers.
AMSOIL LONG LIFE SYNTHETIC
GEAR LUBES are compatible with conventional
gear oils, however mixing oils reduces the benefits
and nullifies the extended service life recommendations.
AMSOIL LONG LIFE SYNTHETIC
GEAR LUBES are compatible with most limited
slip differentials. If limited slip differential
chatter occurs, add AMSOIL Slip-Lock friction
modifier additive.
AMSOIL LONG LIFE SYNTHETIC
GEAR LUBE 75W-90 replaces competitors' 75W-90
and 80W-90 viscosity grades

Did this product meet your expectations?

Good stuff

I use in my Jeep Wrangler, rear differential!

Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)

August 4th, 2017 at 11:42 am

Reviewed by nitro:

good products

I believe fully that Amsoil synthetics are the class of the field in all applications , I use their engine and mix oils in my quads and jet ski , so I seen their extended life gear oil I had to get it for my pickup , it might sound like an ad , but , Amsoil is all good stuff

Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)

June 25th, 2017 at 4:03 pm

Reviewed by Mike:

Gear lube

Worked perfectly....

Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)

May 17th, 2017 at 11:26 am

Reviewed by Mike:

Excellent product

Excellent product. The only fluids I use on my car and trucks.

Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)

May 3rd, 2017 at 2:29 pm

Reviewed by Atec:

Best gear oil

Setup gears and lockers for off road use. Always recommend or install Amsoil gear lube after my work is done. Feel very confident in a successful job especially when using this lube.

Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)

February 19th, 2017 at 5:32 am

Reviewed by Seth:

Better than off-the-shelf shelf

Use it in our work vehicles. After the discount it's cheaper than any auto store

Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)

February 12th, 2017 at 8:46 am

Reviewed by Rich:

Confidence in Amsoil

It's difficult to give a review of a long term oil such as differential lube. But, Amsoil in my 4.2 and my 4.0 Jeep engines was immediately noticed. Jeep in-line 6 motors tend to have valve noise on start up. Totally gone now ! Love that Amsoil ( 10w30). Now switched all 3 Jeeps to Amsoil

Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)

January 28th, 2017 at 6:32 am

Reviewed by Steven:

Lang lasting fluid, it does as it's discribed

This really do last a long time and no issues with over 50,000 miles since changing my rear differential and transfer case and the fluid is still clean.

Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)

December 26th, 2016 at 11:24 am

Reviewed by David:

Lasts longer than conventional gear oil-worth the extra cost

Put this in my 2wd Tacoma open differential, 10,000 miles so far and no issues. I purchased the premium AMSOIL synthetic product for its superior quality and long service life... will last longer and protect my vehicle better than conventional, so in the long run it's definitely worth the added cost.

Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)

December 18th, 2016 at 2:58 pm

Reviewed by Slick mike:

Diff fluid for 90 wrangler

I'm 60 years old and have used every possible lubrication known to man, Mail is by far the best.

Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)

August 30th, 2016 at 3:21 am

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